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(No Model.)

E. WIDER. AUTOMATIC PIRE ALARM.

No. 419,902. Patented Jan. 21, 1890.

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UNITED STATES PATENT OFFICE.

EUGEN WIDER, OF STUTTGART, VVRTEMERG, GERMANY.

AUTOMATIC r-lRla-ALARn/l.`

SPECIFICATION forming part of Letters Patent 110.419,902, dated January21, 1890.

Application filed July 10, 1889.

To all whom it may concern:

Be it known that I, EUGEN WIDER, of Stuttgart, in the Kingdom ofVrtemberg and German Empire, have 4invented new and useful Improvementsin Automatic Fire-Alarms, of which the following is a specification,reference being had therein to the accompanying drawings.

This invention relates to an automatic firealarm for dwellings,warehouses, factories, barns, &c. and it consists of an apparatus placedin such premises and operated at the outbreak of a fire, by means of oneor more fuses, so as to eiect a'strong detonation and to operate, by theclosing of an electric circuit, one or more electric gongs or bells insuitable localities.

Figure 1 is a plan of the apparatus, showing several parts in section onthe line ab, Fig. 2. Fig. 2 is a side view showing the apparatusinsection on the line H H, Fig. 1.

This fire-alarm apparatus is constructed, essentially, as follows: l

A is a metallic plate about ten centimeters long and eight centimeterswide, which is screwed to the wall, floor, or ceiling of the room at anyconvenient part. On this plate A is fixed a metallic chamber B, closedat one end by means of a tightly-fittin g cork plug el, with a pin orscrew, to which is attached a metal plate e. The other end of thischamber has an opening for the reception of the fuses c c, which areconnected to a detonating-cartridge within the chamber B. Opposite tothe plugged end of the chamber B is placed a block l Z, through whichmovesa pin g,having the head f. This pin g slides in a suitable guide h,and its free end is opposite to one end of a contact-spring t, the otherend of such spring being fixed to the block and connected by means ofthe wire oc with the electrical signaling apparatus. The other wire isconnected to the finger k, which is likewise fastened at one end to theblock.

The fuses c c, which are well prepared with saltpeter and phosphorus,are laid along the Serial No. 317,059. (No model.)

walls or in other suitable places in the dierent rooms, and their endsare placed, preferablynear the Iioor.

The action of the apparatus is as follows: At the outbreak of lire in aroom or building supplied with fuses the iire cannot spread beyond thefuses without being noticed. If one of the fuses has caught fire, thelatter will be transmitted in a few seconds to the metal chamber B,where it explodes the detonatingcartridge contained therein. Accordingto the composition of the cartridge the detonation will be more 0r lessloud, and will attract the attention of persons near it. At the sametime the cork plug d is blown out of the chamber against the head f ofthe pin g, which thus pushes the spring c' into contact with the iingerk, closing the circuit and operating the gongs orbells or otherannunciator, which continues until the circuit is again broken.

The signaling apparatus may be at the firestation or at any otherconvenient point.

It is desirable to adopt fuses and cartridges Which are not. readilyaiected by moisture or change ot temperature to an objectionable degree.

lVliat I claim, and desire to secure by Letters Patent of the UnitedStates, isN

In an automatic fire-alarm apparatus, the combination of the annunciatorin circuit, a spring-actuated circuit-closer z', a block Z, carrying thecircuitcloser, a pin in line with and operating the circuit-closer andsupported in the block, a detonatingcartridge carrying fuses at one end,and a plug at the other end of the cartridge and capable of beingexpelled with force by the explosion of the cartridge against the pin tooperate the circuit-closer, substantially as described.

In witness whereof I have hereunto set my hand in presence of twowitnesses.

EUGEN WIDER.

Witnesses:

RICHARD MORITZ, ADoLE F. STERLEE.

